an instrument for measuring height above a given reference level, as the sea or ground: in aircraft it is either an aneroid barometer with a dial marked in feet or meters or an instrument using radar
Origin of altimeteralti- + -meter
An instrument for determining elevation, especially an aneroid barometer used in aircraft that senses pressure changes accompanying changes in altitude.
Origin of altimeterLatin altus high ; see al-2 in Indo-European roots. -meter
Coined based on Latin altus (“high”) + meter.